
Seilar roof mounted tank systems save space at ground level and their elegant simplicity make them efficient and reliable. The Seilar BLF 300 Series is a roof mounted, open circuit solar water heater specifically designed to provide economical service in medium to high solar gain areas.
- Family size
- 300 Capacity (L)
- 2Collectors
- 5yrWarranty†
Reduce water heater energy use
by up to 75 %^
Pricing after solar incentives:
From $2900 Excluding installation
Keys Feature
The BLF-300 Series is ingenious in its simplicity. The black polyester powder coated aluminium absorber collects the sun’s heat and transfers it to the water in the 7 risers. Copper is used for the risers for its high thermal conductivity ensuring the maximum amount of heat energy is passed to the water. As the water in the risers is heated, it rises into the tank to be replaced by cooler water from the tank. The solar heated water is then stored ready for use – hot water free from the sun.
The BLF – 300 Series has a ceramic lined tank with a protective sacrificial anode. The BLF-300 Free Heat features additional anode protection.
- Stylish slimline roof mount design
- Can cut water heating energy use by up to 90%^
- Reliable, low maintenance operation
- Eligible for Government rebates and incentives
* The suggested price is comprised of RRP less the applicable solar incentive and excluding installation. Solar incentive value applies to 300L system in Zone 3.
^ Energy savings of up to 52% to 90% shown are based on Australian Government approved TRNSYS simulation modelling using a medium load. Savings and incentives will vary depending upon your location, type of Seilar system installed, orientation and inclination of the solar collectors, type of water heater being replaced, hot water consumption and fuel tariff. Maximum financial savings off your hot water bill are achievable when replacing an electric water heater on continuous tariff.
† Seilar Warranty Details: 5/5/5 warranty; 5 year cylinder and collectors supply, 5 year parts, 5 year labour. 10/5/5 warranty, 10 year cylinder and collectors supply, 5 year parts, 5 year labour.
Tech Specs
BLF-300 Solar Specifications
| Tank Model | M300 Tank | M302 System |
|---|---|---|
| Storage Capacity | 300 Litres | 302 litres |
| Boost Capacity (Electric) | 150 litres | 150 litres |
| Weight Empty | 71 kg | 121 kg |
| Weight Full | 341 kg | 417 kg |
| A-Width | 2.43 m | 2.48 m |
| B-Length* | 0.51 m | 2.53 m |
* An Additional 0.9m (35.4in) should be left on all four sides of the installation for safe access and servicing. The M30 and M30 Free Heat systems (if installed with a TRV system) can be installed as a solar preheater with a Seilar inline gas booster water heater. Refer to the Seilar gas booster specification sheet for further details on the gas booster.
| M Collectors | |
|---|---|
| Aperture (heating) Area | 1.87 m2 |
| Dimensions | |
| Length | 1937 mm |
| Width | 1022 mm |
| Height | 77 mm |
| Capacity | 3 litres |
| Weight* | |
| Empty | 32 kg |
| Full | 34 kg |
| Working Pressure | 1000 kPa 145 psi |
| Absorber Surface | Black polyester powder coat |
| Absorber Material | aluminium |
| Riser Material | copper tube |
| Tray Material | 0.7 mm aluminium |
| Insulation Material – Base | 38 mm polyester blanket |
| Glass | 3.2 mm tempered low iron glass |
*Weight includes fittings
| Electric Boost Specifications | ||||
|---|---|---|---|---|
| Heating Unit Type | Cooper sheath immersion element | |||
| Supply Voltage | 240 V -250 V | |||
| Recovery Rate (litres/hour) @ 240V and Temperature Rise of: | ||||
| Rating kW |
Current Amps |
30°C litres/hour |
40°C litres/hour |
50°C litres/hour |
| 1.8 | 8 | 51 | 39 | 31 |
| 2.4 | 10 | 68 | 52 | 41 |
| 3.6 | 15 | 103 | 77 | 62 |
| 4.8 | 20 | 137 | 103 | 83 |
| Water Supply | |
|---|---|
| TPR Valve Setting | 1000 kPa 145 psi |
| ECV* Setting | 850 kPa 125 psi |
| Max. Supply Pressure | |
| With ECV | 680 kPa |
| Without ECV | 800 kPa |
| Water Connections | |
| Cold | RP¾/20 |
| Hot | R½ |
*Expansion Control Valve.


